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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

DNS of Stable and Unstable Turbulent Thermal Boundary Layers

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.540
pages 293-296

Hirofumi Hattori
Information and Analysis Technologies Division, Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showaku, Nagoya 466-8555, JAPAN

Tomoya Houra
Department of Electronical and Mechanical Engineering, Department of Environmental Technology, Nagoya Institute of Technology, Gokiso-cho, Showa-ки, Nagoya 466-8555, JAPAN

Yasutaka Nagano
Nagoya Industrial Science Research Institute; Department of Mechanical Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan


This paper presents direct numerical simulations (DNS) of stable and unstable turbulent thermal boundary layers. Since a buoyancy-affected boundary layer is often encountered in an urban environmental space where stable and unstable stratifications exist, exploring a buoyancy-affected boundary layer is very important to know the transport phenomena of the flow in an urban space. Thus, in order to investigate a buoyancy-affected boundary layer, we carried out time and space developing DNSs simulating stable and unstable turbulent thermal boundary layers. In the DNS results, the fundamental turbulent statistics of stable and unstable thermal boundary layers are shown, in which near-wall variations of turbulent quantities are difficult to measure experimentally, and then discussed.

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